Completing a dungeon will also allow specific ability text on other cards to be used, with Gloom Stalker and the very meta Dungeon Crawler revealed as two such cards that gain benefits from a completed dungeon - double strike and the option to return to the player's hand from the graveyard respectively
This can be seen with FF2 's Firion, and in the case of FF9 , Zidane Tribal can be found in booster packs as Ragavan, Nimble Pilferer, a popular card in Magic: The Gathering 's Modern and other formats, too
Copies of each can be had for around $0.50 these days, which is hardly exciting
Return up to two target permanent cards from your graveyard to your hand
This changes a lot of how drafting feels, because it allows you to cement a specific strategy a little bit earlier on, or just take the two best cards in your first pack and figure it out from there
Based on context, there's a chance the term "challenge" is a less confrontational version of battling or attacking an enemy card